Process for the preparation of pearl essence



Patented Jan. 25, 1927.

UNITED STATES PATENT OFFICE.

man rAIssnAUI or ooonnnvorn, rnnncn.

PROCESS FOR THE PREPARATION OF PEARL ESSENCE.

No Drawing. Application filed August 19., 1924, Serial Ito. 733,018, and in France September 15, 1823.

In the patent a plication filed the 10th of August, 1921, erial No. 491,310, applicant described a process for purifying pearl essence according to which the said essence is mixed with a substance capable of destroying the protoplasmic substances in which the crystalloids or brilliant particles of the essence are included and which conceal their brilliancy, after the stirring of the mixture, the denudated brilliant particles are separated from the impure liquid by sedimentation, centrifu ation or other means.

' 'Applicant cited some etersive agents, such as saponine, neutral'soap, benzin, etc.

p The present invention has for its object a process for purifying pearl essence analogous to the above process, but which is based upon the use of other substances which are capable of reducin the surface tension of the constitutive liquid of earl essence. Due to the addition of such su stances, the liquid becomes capable of perfectly moistening the particles which it contains in suspension so I that, under the influence of the s'tirrin the said particles become perfectly dcterge By way of example, a certain number of solutions which are particularly easy to prepare are indicated as follows:

(1 Bile solution.

w 2 Sodium) or suZpho-fim'nate aolutzon.

Sulphoricinate, 2 grams; water, 1 litre.

(3) Ethyl alcohol solution.

Saponine, 0.5 gram; alcohol (approx), 1 40 lltre.

(4) Album nous solution.

White of the egg (or the like), 1 gram; water, 1 litre. The above-mentioned proportions will vary with the source of the products, and it 1s preferable to verify-in all cases in practlce the surface tension. which is obtained by the known method of counting the drops.

Ciaims:- l 1. A process for the preparation and urifyingof pearl essence by detersion o the crystalloids, consisting in mixin the said pearl essence with a substance w ichis caable of reducing the surface tension of the iquid to such avvalue that the said liquid will perfectly moisten the constitutive crystalloids of pearl essence, then in stirring the mixture and in separating the crystalloids from the impure liquid. v

2. A process for the preparation and purifying of earl essenceby detersion of the crystalloi s, consisting in mixing sulforicinates with the said essence in order tpl bring the surface tension to such a value t at the said liquid will perfectly moisten the constitutive crystalloids of pearl essence, then in stirring the; mixture and in separating the crystalloids from the impure liquid. 7 In testimony that I claim the foregoing as my invention, I have signed my name.

PAISSEAU, 

